Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KO4WAT callsign genealogy
Currently held by CHRESTMAN, MATTHEW E
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by KO4WAT's current licensee, walking backwards.
- CHRESTMAN, MATTHEW EVAgranted 2020-06-11cancelled 2020-06-30
Successor callsigns
Callsigns held now by people who previously held KO4WAT.
No current licensee on record previously held this callsign.